What is the black stuff growing on my waterfall? Is it a problem?

[Doghouserez]

Minnesota. Approx 70-80f. Goldfish, trapdoor snails, filter box, 1 hyancinth 1 lettuce.

 

[JohnHuff]

Can we have a close up please?

 

[Doghouserez]

Thanks. here are closer photos.

 

[Chinjuspond]

I don't think it's a matter of growing. I think it's sludge from waste. I had an issue like that. I cleaned my filters and added an Eco cleaner. I also clanged some water out and added carbon to clear up some of the brown water coloring

 

[Edp]

Did you ever figure out how to correct this problem. I have this also.

 

[morewater]

It's normal, even with mechanical filtration.

Leave it.

If it bothers you that much, pressure wash it off. It's not like it occurred overnight and you'll have to do it every day.

 

[tbendl]

Can't you also use hydrogen peroxide to clean it by turning off the waterfall, spraying the HP and rinsing?

 

[Lisak1]

Hydrogen peroxide will clean that off - we use sodium percarbonate. Sold commercially by pond suppliers or you can just buy the compound (for about 1/100th of the cost).